JPH0616827B2 - Granule processing method and device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method and apparatus for treating powder and granules, and more particularly to powder and granules for carrying out treatments such as granulation, coating, drying and mixing of powder and granules in a fluidized bed type processing chamber. A body processing method and apparatus.

[Background technology]

In general, a fluidized bed type granular material treatment technology is to eject a gas flow from below a fluidized bed consisting of a fixed perforated plate to fluidize the granular material in the processing chamber, and then use the binder solution to form the granular material. Have been proposed.

However, in this conventional technique, the granules are granulated only by being brought into a fluidized state only by the action of the jetted gas flow, so the granulated product is light and has an irregular shape, and the particle size distribution varies widely. I have a problem.

Therefore, it is proposed that the fluidized bed in the processing chamber be a rotating plate, and that the rotating plate and the gas flow from below give centrifugal rolling and swirling action to the granular material to produce a uniform granulated product. (See, for example, JP-A-59-55337).

According to this conventional technique, an excellent effect such as the production of a uniform granulated product having a desired particle size can be obtained, but only one rotating plate is provided, and powder on the rotating plate is used. The force to move the particles in the radial direction is given by the rotation of the rotating plate. Therefore, if the centrifugal rolling of the granular material on the rotating plate and the pressing force of the granular material against the inner wall of the processing chamber is insufficient, it may not be possible to obtain a desired heavy granulated product. obtain.

[Object of the Invention]

It is an object of the present invention to provide a method and an apparatus for treating powder and granules, which makes it possible to obtain a heavy and uniform product.

Another object of the present invention is to provide a method and apparatus for treating powder and granules, which can improve the treatment efficiency such as granulation, coating and drying.

Still another object of the present invention is to easily clean the inside of the processing chamber,
An object of the present invention is to provide a method and an apparatus for treating powder and granules, which can obtain a clean product without cross contamination.

Still another object of the present invention is to provide a method and an apparatus for treating powder or granular material, which does not leak the powder or granular material.

[Outline of Invention]

According to the present invention, a plurality of rotating plates are separated from each other by an annular ventilation member, and a gas introduced from a ventilation opening of the rotating plate radially inward of the annular ventilation member is ejected radially outward through the annular ventilation member. In addition, by rotating the rotary plate, the rotation of the rotary plate and the gas flow outward in the radial direction ejected through the annular ventilation member are processed while rolling on the granular material. is there.

As a result, the granular material is subjected to the centrifugal rolling motion and the pressing action by the gas flow radially outward on the rotating plate, and is processed while receiving the pressing force toward the inner wall of the processing chamber. Can be produced efficiently, and also prevent powder leakage,
The cleaning property can be improved.

[Embodiment 1] FIG. 1 is an overall schematic cross-sectional view of a powdery or granular material processing apparatus according to an embodiment of the present invention, and FIG. 2 is an enlarged partial cross-sectional view of a main part thereof.

In the present Example 1, the powder and granular material processing apparatus was used to granulate the powder and granular materials,
It has a structure in which an upright cylindrical processing container 1 for performing processing such as coating, mixing, and drying is erected on a base 2. A processing chamber 3 which forms a flow chamber is provided in the processing container 1 as described later. A raw material inlet 4 for supplying the raw material for the granular material is attached to the side surface of the processing chamber 3.

Further, a rotary shaft 5 is vertically provided at the center of the bottom of the processing chamber 3, and the rotary shaft 5 is rotated by a motor 6. On the upper part of the rotary shaft 5, a plurality of disc-shaped rotary plates 8 are arranged in a multi-layer structure with a predetermined gap in the vertical direction. That is, the lowermost rotating plate 8 is held by the rotating shaft 5 by the retaining ring 9, and the rotating plate 9 located next to the uppermost rotating plate 9 is at the lowermost position by the height of the ventilation ring 10 which functions as a spacer and a powder leakage preventing means. Is separated from the rotary plate 8. The number of the rotary plates 8 of this embodiment is 5, and the rotary plates 8 above the third plate from the bottom also have the ventilation ring 1 between them in the same manner as described above.
0 are arranged in a multi-layer structure. The rotating plate 8 rolls powder particles on the upper surface thereof by centrifugal action or the like, and is configured such that the diameter gradually decreases from the lowermost part to the uppermost part. The top rotary plate 8 is the cap 1
1 is fixed to the rotary shaft 5 by screwing.

The ventilation ring 10 is positioned by fitting the upper end of the ventilation ring 10 into the annular groove 8a on the back surface of each rotating plate 8 so that the axis of the rotating plate 8 is not displaced by the rotation of the rotating plate 8.

The rotating plate 8 and the ventilation ring 10 can be easily and detachably assembled by sequentially fitting the rotating shaft 5 alternately with the cap 11 removed. Therefore, the rotary plate 8 and the ventilation ring 10 can be easily removed and individually cleaned by removing the cap 11 and then sequentially pulling out from the rotary shaft 5 during cleaning. As described above, with the detachable structure, the rotary plate 8 and the ventilation ring 10 of the present embodiment can maintain high cleanliness, and the inside of the processing chamber 3 can be kept clean.

The ventilation ring 10 is made of, for example, a porous material or a mesh,
It is made of a material that is breathable and can act as a leak preventer for granules.

Further, the rotary plate 8 is provided with a ventilation opening 12 radially inside the ventilation ring 10 except for the uppermost rotary plate 8. A plurality of the ventilation openings 12 may be circumferentially spaced from each other, as shown in FIG. 5, or openings of other shapes or donut-shaped structures may be used. is there. In FIG. 5, the hole 13 at the center of the rotary plate 8 is a hole through which the rotary shaft 5 is inserted.

On the other hand, below the rotary plate 8 at the bottom of the processing quality 3,
Gas is supplied from the blower 14 through the valve 15. This gas passes through the ventilation opening 12 of the rotary plate 8.
In addition to being ejected from the ventilation ring 10 to the outside in the radial direction, the powder is supplied into the processing chamber 3 through the annular space 16 formed between the periphery of the rotary plate 8 and the inner wall of the processing container 1, It functions as a gas that fluidizes the raw materials.

A discharge mechanism 17 for taking out a product is provided on the side surface of the processing container 1 which is substantially at the same height as the lowermost rotary plate 8.

Further, in the processing chamber 3 on the side of the rotary plate 8, a crushing mechanism 18 for crushing the powder particles during processing to obtain a spherical product having a high bulk density, and a coating liquid or a binder. A spray device 19 such as a two-fluid spray gun structure for spraying liquid or the like is provided. Above the rotating plate 8 is a spray device 2 such as a two-fluid spray gun structure.
It is also possible to set 0.

Further, on the upper part of the processing container 1, a bag filter 21 for collecting fine powder accompanied with the gas flow, a lid 22 for explosive diffusion,
Further, an exhaust duct 23 for discharging the exhaust to the outside of the system is provided.

The operation of this embodiment will be described below.

First, when the powdery or granular material is charged into the processing chamber 3 from the raw material charging port 4, for example, the gas from the blower 14 is passed through the valve 15 as necessary so that the powdery or granular material does not leak from the annular space 16. While supplying below the rotary plate 8,
The raw material powder is added.

Next, the rotary shaft 5 and the rotary plate 8 are rotated, and the valve 15 is further opened to supply the gas for fluidization into the processing chamber 3 from the annular space 19. Further, a coating liquid or a binder liquid is supplied into the processing chamber 3 from one or both of the spray devices 19 and 20, and the disintegration mechanism 18 is operated as necessary.

As a result, the gas from the blower 14 is ejected from the ventilation opening 12 of the rotary plate 8 through the ventilation ring 10 to the outside in the radial direction between the rotary plates 8 and is supplied into the processing chamber 3 through the annular space 16. .

Therefore, the granular material is fluidized by the gas flow from the annular space 16, and the rotation of the rotary plates 8 causes the granular material on each rotary plate 8 to undergo centrifugal rolling operation and roll. In addition to the above, the granular material is subjected to a force in the radial direction by the gas flow ejected from the ventilation ring 10 in the radial direction, and is pressed against the inner wall surface of the processing container 1. A radially outward force can result in a heavy product.

In addition to the centrifugal rolling motion due to the rotation of the rotary plate 8, the powder and granules are subjected to the action of the gas flow outward in the radial direction, whereby the action such as rolling and dispersion is promoted, so that the uniform grain size is obtained. In addition to being able to obtain a spherical product, the processing efficiency can be improved by, for example, improving the stretching speed of the film of the coating liquid or the drying speed.

The product manufactured in this manner is taken out to the outside by the opening of the discharging mechanism 17 and collected.

[Embodiment 2] FIG. 3 is an enlarged partial sectional view showing an essential part of another embodiment of the present invention.

In the second embodiment, the rotary shaft 5 extends from the upper side to the lower side, and the nut 24 is screwed onto the lower end of the rotary shaft 8 to form a plurality of rotary plates 8.
Also, the ventilation ring 10 has a structure in which the ventilation ring 10 is detachably assembled in multiple layers.

Also in the case of the second embodiment, a heavy product can be efficiently manufactured by the centrifugal force generated by the rotation of the rotating plate 8 and the gas flow force ejected from the ventilation ring 10 toward the radially outer side. .

[Embodiment 3] FIG. 4 is an enlarged partial sectional view showing still another embodiment of the present invention.

In the third embodiment, instead of the ventilation ring 10 made of the air-permeable substance in the first embodiment, a ventilation ring 10a provided with a gas ejection hole 10b having a size capable of preventing the leakage of powder particles is used. . The ventilation ring 10a has a smaller diameter than the ventilation ring 10,
It has a diameter which is considerably smaller than the diameter of the rotary plate 8 which is separated by 0a.

In addition, in the third embodiment, the rotary plate 8 excluding the uppermost and lowermost ones has a donut-shaped structure, and the uppermost rotary plate 8 also has a more radial direction than the lower ventilation ring 10a. A vent hole 25 is provided in the vertical direction at the inner portion.

Also in the case of the third embodiment, the rotation of the rotary plate 8 and the gas ejection hole 1
A heavy product can be efficiently obtained by the gas flow ejected from 0b to the outside in the radial direction, and the plurality of rotary plates 8 and the ventilation ring 10a can be easily assembled and removed simply by removing the cap 11. Since it can be decomposed and has good cleaning properties, it can maintain its cleanliness and can be sanitized for a long period of time.

It should be noted that this embodiment is not limited to the above embodiment, and various other modifications are possible.

For example, the shape of the processing container can be substantially spherical as shown by 1a in FIG.

Further, the diameter of the ventilation ring or the rotary plate, the number of rotary plates, and the like can be appropriately selected.

Further, the rotary plate can be fixed to the rotary shaft at predetermined intervals.

Further, the gas ejection holes may be formed in the tangential direction of the ventilation ring.

〔effect〕

(1). Due to the centrifugal rotation operation caused by the rotation of the plurality of rotary plates and the action of the gas flow ejected radially outward from the annular ventilation member forming the gap between the rotary plates, the powder and granules become the inner wall of the processing chamber. Since it is pressed in the direction, a heavy product can be obtained.

(2). By the action of the gas flow to the outside in the radial direction, it is possible to improve the processing efficiency such as granulation, coating, mixing, or drying of the granular material.

(3). The annular ventilation member can prevent the granular material from leaking to the ventilation opening of the rotary plate, eliminate waste of material, and enable hygienic granular material processing.

(Four). Since the rotating plates and the breathable annular members that separate the rotating plates from each other are alternately arranged so as to be detachable from each other, they can be easily disassembled and washed, and high cleanliness can be maintained. It becomes possible to perform extremely hygienic treatment without causing nations, and so-called GMP (Good Machining Practic).
e) It is very advantageous, and it is also useful for processing pharmaceuticals, foods, etc.

[Brief description of drawings]

FIG. 1 is an overall schematic cross-sectional view of a powdery- or granular-material processing apparatus according to one embodiment of the present invention, and FIG. 2 is an enlarged partial cross-sectional view of a main part thereof.
FIG. 3 is an enlarged partial sectional view showing an essential part of another embodiment of the present invention, FIG. 4 is an enlarged partial sectional view showing still another embodiment of the present invention, and FIG. 5 shows an example of a rotating plate. It is a top view. 1, 1a ... Processing container, 2 ... Base, 3 ... Processing chamber, 4 ... Raw material input port, 5 ... Rotating shaft, 6 ... Motor, 8 ... Rotating plate, 8a ... Annular groove, 9 ... Retaining ring, 10, 10a ... Ventilation ring, 10b ... Gas ejection hole, 11 ... Cap, 12 ... Ventilation opening, 13 ... Hole, 14 ... Blower, 15 ... Valve, 16 ... Annular space, 17 ... unloading mechanism, 18 ... crushing mechanism, 19, 20 ... spraying device, 21 ... bag filter, 22 ... explosive diffusion lid, 23 ... exhaust duct, 24 ... nut, 25 ... Vent hole.

Claims (3)

[Claims] 1. A gas introduced from a ventilation opening radially inward of the annular ventilation member of the rotary plates arranged in a plurality of layers at predetermined intervals in the processing chamber through the annular ventilation member, through the annular ventilation member. Gush out to the outside in the radial direction,
The granular material treatment, wherein the granular material is treated while rolling on the rotational plate by the action of the rotation of the rotary plate and the gas flow ejected through the annular ventilation member to the outside in the radial direction. Method. 2. A fluidized bed type powdery or granular material processing chamber, a rotary shaft standing upright in the central portion of the process chamber, and a multi-layered structure supported by the rotary shaft with a predetermined gap therebetween. A plurality of rotating plates, an annular ventilation member that separates the rotating plates from each other in the vertical direction, a ventilation opening formed in the rotating plate at a portion radially inward of the annular ventilation member, and the rotating shaft. A powdery or granular material processing apparatus comprising: a means for rotationally driving and a means for supplying a gas flow from below the rotary plate. 3. The powdery or granular material processing apparatus according to claim 2, wherein the rotary plate and the annular ventilation member are alternately arranged so as to be detachable from each other.